Dragon-Spell
The Hobbit: On the Doorstep #51 (x2/x0)
Treachery

When Revealed: Attach to the hero with the most resources without Dragon-Spell attached. (Counts as a Condition attachment with the text:

"Attached hero gets -1 Willpower for each resource in its resource pool.

Forced: When attached hero spends resources, attached hero takes X damage. X is equal to the number of resources spent.")